Trestle for scaffolding



(No Model.)

M. PINKSTON.

TRESTLE FOR SGAFPOLDING.

No. 340,004. Patented Apr. 13, 1886.

n. mum Phnlo-Ulhcgmabm wm m a c UNITED STATES PATENT OFFICE.

MEBRIL IIXKSTON, OF GARNETT, KANSAS.

TRESTLE FOR SCAFFOLDlNG.

SPECIPECATION forming part of Letters Patent No. 340,001 dated April 13, 1886.

Application tiled January 30, i886.

'le it known that I, Mannie Pnvns'roN, a citizen of the United States, residing at Garnett, in the county of Anderson and State of Kansas, have inventedcertain new and useful improvemenls in Trt-stlcs forhrali'olding; and Ido declare the lbllowingto boa full, clear and exact description olthe invention, such as will enable others skilled in the art to which it appertains to make and use the name, reference being bad to the accompanying drawings, and to the letters and figures ofreferencc marked thereomwhich form apart ot'this Sptfilllttttllfll].

This invention relates to trestles tot-scaffold ing, and has for its objcrtto provide a simple, inexpensive, and do rable trestle, which iscapa ble of being folded for transportationaudstorage, and can be adjusted to different heights, as desired; and it consists of thepartsand coinbinations of parts hereinafter described and claimed.

in the accompanying drawings, forming a part of this Specification, Figure 1 is an end view of my improved trestle; Fig. 2, a side view; Fig. 3, a perspective view, and Fig. l a detail view.

Similarlettcrsrefertosimilar partsthroughout the several views.

A represents the main supporting-legs, and B the props lhm'el'or. These latter are pivoted to the main legs A, so that the latter can be folded within them when it is necessary to move the trestle from place to place or tostore it away. By moving these props toward or from the main legs the height of the scaffold ing is regulated. A chain or rope, U, is socured to one of the lower crossbar-s, I), of the main legs A, and extends across to the lower cross-bar, I), of the props ll, and is there cured by a hook in its end to a staple in said bar 1], or in any other suitable manner. The main legs A are suitably braced by means of the bars Don one side and the bars F on the other. These bars are grooved on their adjacent surfaces, as at c, Fig. r, for the reception ofthezuljustable upright G, tor which the said bars form a brace, permitting at the same time its sliding up and down therein, and thusproriding for the raising or lowering of the seaffolding to suit rooms of different heights, as this invention is more expressly designed for the use of indoor workmen; but it may be used Serial No. 190,290. (No model.)

outside, if desired. The adjustable uprightG is provided with a number of perforations or openings, h, at suitable distances apart, which correspond in size to an opening or perforation, (1, in the short upper brace-bar, ll, ofthe main legs A. A pin, 11, fastened to the end of a chain orcord, c, which is secured to one of the main legs, is intended to be inserted through the opening 6 into one of the openings b in the uprightmo secure thesameagainst movement after it has been adjusted to the proper or desired height. At the upper end of the upright h a groove It, is formed, either by means of the two cheek pieces Ii, secured to the side of the sides of the upright, or the end of the upright may be of one piece of greater diameter than its body and the groove outthcroin. In either event the bottom surface of the groove is rounded, so that a log placed therein will be supported level and prevented turning by means of the cheekpieces it. Through the check-pieces or enlarged end of the upright the latter may be supported without using the pin d, when the upright is in the position shown in Fig. 3, as in that case the check-pieces will rest on the upper ends of the legs A. It will thus besecn that I provide a very simple device, whereby thesame trestle may be used in rooms of different heights by simply adjusting the props nearer to or farther apart, and that a still greater height may be reached by merely sliding the upright G in its grooves or ways and securing it there by means of the pin (1.

I am aware that adjustable perforated uprights, forming a support for a cross-bar on which the scatfolding rests, have been used in folding trestles, and I do not desire to be understood as claiming such, broadly.

Having thus described my invention, what I claim as new, and desire to secure by Lettors Patent, is

1. The herein-described trestle for scaflolding, comprising the main legs A, the pivoted props B, thegrooved brace bars I) F, theehain U, the perforated bar II, and the adjustable upright G, provided with the perforations b, grooved upper end. Ii, and pin d, substantially as and for the purpose described.

2. The combination, in a trestle having adjustable props, of the adjustable upright G,

I having the perforations b, the grooved cross- ICO bars D F, the perforated cross-bar H, and the In testimony whereof I affix my signature in pin (1, substantially as and for the purpose depresence of two witnesses. scribed. T T 3. The combination, in a trestle, of the ad- MERRIL PIBIXSTOL' 5 jnstable upright G, having thegrooved upper Vitnvsses:

end. 1:, and the groove] cross-burs, snbsmn- M. L. \VHITE.

tiall y as and fur the purpose described. WALTER DAVIS. 

